floating-rib

floating rib

noun Anatomy.
one member of the two lowest pairs of ribs, which are attached neither to the sternum nor to the cartilages of other ribs.

Origin:
1825–35

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
floating rib
 
n
any rib of the lower two pairs of ribs in man, which are not attached to the breastbone

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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American Heritage
Medical Dictionary

floating rib n.
Any of the two lowest pairs of ribs with no anterior attachment to the sternum. Also called vertebral rib.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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